GR3024007T3 - A method of making biocompatible capsules containing cells. - Google Patents

A method of making biocompatible capsules containing cells.

Info

Publication number
GR3024007T3
GR3024007T3 GR970401661T GR970401661T GR3024007T3 GR 3024007 T3 GR3024007 T3 GR 3024007T3 GR 970401661 T GR970401661 T GR 970401661T GR 970401661 T GR970401661 T GR 970401661T GR 3024007 T3 GR3024007 T3 GR 3024007T3
Authority
GR
Greece
Prior art keywords
gum
cells
pct
droplets
solution
Prior art date
Application number
GR970401661T
Other languages
Greek (el)
Inventor
Heather Anne Clayton
Roger Frank Lever James
Nicholas John Milton London
Original Assignee
Univ Leicester
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GB919117980A external-priority patent/GB9117980D0/en
Priority claimed from GB929207143A external-priority patent/GB9207143D0/en
Application filed by Univ Leicester filed Critical Univ Leicester
Publication of GR3024007T3 publication Critical patent/GR3024007T3/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N11/00—Carrier-bound or immobilised enzymes; Carrier-bound or immobilised microbial cells; Preparation thereof
    • C12N11/02—Enzymes or microbial cells immobilised on or in an organic carrier
    • C12N11/04—Enzymes or microbial cells immobilised on or in an organic carrier entrapped within the carrier, e.g. gel or hollow fibres
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00—Medicinal preparations characterised by special physical form
    • A61K9/14—Particulate form, e.g. powders, Processes for size reducing of pure drugs or the resulting products, Pure drug nanoparticles
    • A61K9/16—Agglomerates; Granulates; Microbeadlets ; Microspheres; Pellets; Solid products obtained by spray drying, spray freeze drying, spray congealing,(multiple) emulsion solvent evaporation or extraction
    • A61K9/1605—Excipients; Inactive ingredients
    • A61K9/1629—Organic macromolecular compounds
    • A61K9/1652—Polysaccharides, e.g. alginate, cellulose derivatives; Cyclodextrin
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00—Medicinal preparations characterised by special physical form
    • A61K9/48—Preparations in capsules, e.g. of gelatin, of chocolate
    • A61K9/50—Microcapsules having a gas, liquid or semi-solid filling; Solid microparticles or pellets surrounded by a distinct coating layer, e.g. coated microspheres, coated drug crystals
    • A61K9/5005—Wall or coating material
    • A61K9/5021—Organic macromolecular compounds
    • A61K9/5031—Organic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyethylene glycol, poly(lactide-co-glycolide)
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00—Medicinal preparations characterised by special physical form
    • A61K9/48—Preparations in capsules, e.g. of gelatin, of chocolate
    • A61K9/50—Microcapsules having a gas, liquid or semi-solid filling; Solid microparticles or pellets surrounded by a distinct coating layer, e.g. coated microspheres, coated drug crystals
    • A61K9/5073—Microcapsules having a gas, liquid or semi-solid filling; Solid microparticles or pellets surrounded by a distinct coating layer, e.g. coated microspheres, coated drug crystals having two or more different coatings optionally including drug-containing subcoatings

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Public Health (AREA)
  • Animal Behavior & Ethology (AREA)
  • Medicinal Chemistry (AREA)
  • Pharmacology & Pharmacy (AREA)
  • Veterinary Medicine (AREA)
  • Genetics & Genomics (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Organic Chemistry (AREA)
  • Biomedical Technology (AREA)
  • General Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
  • Microbiology (AREA)
  • Biotechnology (AREA)
  • Dispersion Chemistry (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Medicinal Preparation (AREA)
  • Immobilizing And Processing Of Enzymes And Microorganisms (AREA)
  • Micro-Organisms Or Cultivation Processes Thereof (AREA)
  • Manufacturing Of Micro-Capsules (AREA)

Abstract

PCT No. PCT/GB92/01511 Sec. 371 Date Jun. 22, 1994 Sec. 102(e) Date Jun. 22, 1994 PCT Filed Aug. 14, 1992 PCT Pub. No. WO93/03710 PCT Pub. Date Mar. 4, 1993.Contaminating protein is removed from a water soluble gum such as alginate by dialyzing a solution of the gum against a solution of a disulphide bond reducing agent. Purifying the gum by removing antigenic protein improves biocompatability of the gum for making biocompatible capsules containing cells such as mammalian cells. The reducing agent is preferably dithiothreitol, dithioerythritol or 2-mercaptoethanol. Dialyzing is preferably carried out for more than 1 hour and more preferably twice, each time for 2 hours. Cells are encapsulated by forming a suspension of cells in an aqueous solution of the gum, forming droplets from the suspension, gelling the droplets with a multivalent cation, contacting the gelled droplets with a polymer containing cationic groups, such as poly-1-lysine chloride, that cross-link with anionic groups of the gum to form a semi-permeable membrane around the droplets, and coating the membrane with a layer of the dialyzed gum. Islets of Langerhans cells can be encapsulated for implanting to produce insulin. In addition to encapsulating cells, the purified gum can be used in making dressings, swabs, sutures, stitches, controlled or sustained release devices and artificial vascular grafts that come in contact with body fluids such as blood.
GR970401661T 1991-08-20 1997-07-08 A method of making biocompatible capsules containing cells. GR3024007T3 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB919117980A GB9117980D0 (en) 1991-08-20 1991-08-20 A method of making biocompatible capsules containing cells
GB929207143A GB9207143D0 (en) 1992-04-01 1992-04-01 A method of making biocompatible capsules containing cells
PCT/GB1992/001511 WO1993003710A1 (en) 1991-08-20 1992-08-14 A method of making biocompatible capsules containing cells

Publications (1)

Publication Number Publication Date
GR3024007T3 true GR3024007T3 (en) 1997-10-31

Family

ID=26299426

Family Applications (1)

Application Number Title Priority Date Filing Date
GR970401661T GR3024007T3 (en) 1991-08-20 1997-07-08 A method of making biocompatible capsules containing cells.

Country Status (13)

Country Link
US (1) US5529913A (en)
EP (1) EP0599942B1 (en)
JP (1) JPH06510035A (en)
AT (1) ATE152616T1 (en)
AU (1) AU2443392A (en)
CA (1) CA2115664A1 (en)
DE (1) DE69219606T2 (en)
DK (1) DK0599942T3 (en)
ES (1) ES2101863T3 (en)
GR (1) GR3024007T3 (en)
IL (1) IL102785A (en)
MX (1) MX9204831A (en)
WO (1) WO1993003710A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9414304D0 (en) * 1994-07-15 1994-09-07 C V Lab Ltd Fibres, manufacture and use
AU1557000A (en) * 1998-11-20 2000-06-13 Autonomous University of Barcelona, The Insulin production by engineered muscle cells
US6921412B1 (en) 1999-05-18 2005-07-26 Cryolife, Inc. Self-supporting, shaped, three-dimensional biopolymeric materials and methods
ATE431165T1 (en) * 2000-01-25 2009-05-15 Edwards Lifesciences Corp BIOACTIVE COATINGS TO PREVENT TISSUE GROWTH ON ARTIFICIAL HEART VALVES
AU9118201A (en) 2000-09-20 2002-04-02 Islet Sheet Medical Llc Improved methods for fabrication of thin sheet bio-artificial organs
EP1416946B1 (en) * 2000-11-07 2017-12-20 CryoLife, Inc. Expandable foam-like biomaterials and methods
US20060246111A1 (en) * 2005-04-19 2006-11-02 Smith Larry L Polysaccharides as ultrasound transmission media
WO2012130567A1 (en) * 2011-03-29 2012-10-04 Beta-Cell Nv Method for encapsulated therapeutic products and uses thereof

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO158284C (en) * 1981-03-13 1988-08-17 Damon Biotech Inc PROCEDURE FOR SELECTIVE USE OF A PERMEABLE MEMBRANE.
EP0301777A1 (en) * 1987-07-28 1989-02-01 Queen's University At Kingston Multiple membrane microencapsulation
US4923645A (en) * 1987-11-16 1990-05-08 Damon Biotech, Inc. Sustained release of encapsulated molecules

Also Published As

Publication number Publication date
JPH06510035A (en) 1994-11-10
EP0599942A1 (en) 1994-06-08
DE69219606T2 (en) 1997-09-04
EP0599942B1 (en) 1997-05-07
IL102785A0 (en) 1993-01-31
AU2443392A (en) 1993-03-16
US5529913A (en) 1996-06-25
DE69219606D1 (en) 1997-06-12
DK0599942T3 (en) 1997-11-03
ES2101863T3 (en) 1997-07-16
MX9204831A (en) 1993-07-01
IL102785A (en) 1998-06-15
CA2115664A1 (en) 1993-03-04
ATE152616T1 (en) 1997-05-15
WO1993003710A1 (en) 1993-03-04

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